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src/HOL/AxClasses/Semigroups.thy
author nipkow
Thu, 10 May 2001 17:28:40 +0200
changeset 11295 66925f23ac7f
parent 10681 ec76e17f73c5
child 12338 de0f4a63baa5
permissions -rw-r--r--
improved tracing of permutative rules.
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(*  Title:      HOL/AxClasses/Semigroups.thy
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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*)
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theory Semigroups = Main:













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consts













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  times :: "'a => 'a => 'a"    (infixl "[*]" 70)













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axclass semigroup < "term"













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  assoc: "(x [*] y) [*] z = x [*] (y [*] z)"













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consts













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  plus :: "'a => 'a => 'a"    (infixl "[+]" 70)













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axclass plus_semigroup < "term"













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  assoc: "(x [+] y) [+] z = x [+] (y [+] z)"













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end















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